Conti vit y 251 ABOT D eployment
Version 1. 0
April 26, 2004
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Contivity 1700 series (1700 and 1740): Up to 500 VPN tunnels
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Contivity 2700: Up to 2000 VPN tunnels
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Contivity 5000: Up to 5000 VPN tunnels
If Contivity 200 series is planned to be used in CO, this method is not applicable, since C200
Hard Client cannot connect to C200 gateway. Thus, manually configuring is required.
2.2.2 Select C251 model
Refer to the following information to select suitable C251 models for locations where ADSL
services are available.
CA251: Annex A
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ADSL over analog phone service
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Tone 6~ 31 (25 ~ 138 KHz)
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Multi-mode, G.DMT, ANSI T1.413, G.Lite
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Used throughout North, South and Central America, Asia and portions of
Europe.
CB251: Annex B
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ADSL over ISDN,
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Tone 29~ 63 ( 125 ~ 270KHz)
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Multi-mode, G.DMT, ETSI
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Used mostly in Europe
CU251: U-R2
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ADSL over ISDN
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Tone 29~ 63 ( 125 ~ 270KHz)
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Multi-mode, G.DMT, ETSI
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Used in Germany w ith Deutsche Telecom
2.2.3 In areas where ADSL service is not available
In the areas where ADSL service is not available, consider using C221 over satellite-based
Internet service or over Broadband High speed internet access service. E.g. DIRECWAY provide
satellite-based Internet service anywhere in the continental U.S.
2.3 Gathering Information from ISP
2.3.1 VPI & VCI
The Virtual Path Identifier (VPI) and Virtual Circuit Identifier (VCI) for ISP ATM backbone are the
most important information to enter to get a C251 ADSL working. Each ADSL service provider
uses a set of these two numbers.
Below are a list of the ADSL service Providers and their corresponding VPI/VCI numbers for
configuring ADSL Modems to work on their Networks. Users should always contact with their
service providers for the updated information.
